CONNECTIVE TISSUE GLAND
ENDOCRINE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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within an organism
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from outside the organism
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in the blood
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in the air
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Detailed explanation-1: -As the name implies, the internal stimulus comes from within the organism. For example one of the internal stimuli is hunger which is the sign of low energy in the body. It stimulates us to eat something to regain the needed energy.
Detailed explanation-2: -An organism must respond to changes in the internal environment as well. Internal conditions include the level of water, nutrients, and minerals inside the body. It also refers to body temperature and hormone levels.
Detailed explanation-3: -A stimulus can be external, meaning it occurs outside the organism, like the sound of thunder and the flash of lightning. A stimulus can also be internal, or from within the organism itself, like thirst or hunger. Both external and internal stimuli can cause a response, or reaction, from an organism.